Need a balance staff for pocket watch

[Nucejoe]

I have got some with J>140 but  A~620,  One would think to cut out a pivot on it at 580 on lathe. The measurements you gave are inexact too. 

To do without lathe,  we both should do better homework.

I have set aside a number of possible candidates.

 

 

 

 

 

 

 

[Daniel123]

I’m now thinking of getting a lathe, I managed to get the A measurement by balancing staffs in place until I found the correct one. The other measurements I got from the existing staff. Thank you so much for looking through your collection you’ve definitely gone above and beyond. The movement is Swiss and doesn’t seem to conform to a standard size, I could potentially ask a professional to trim an existing staff to size, I would love to buy a lathe and adjust one myself but money is definitely tight during lock down I have a feeling that this project will be ongoing for some time. I suppose being patient is a good virtue for a amateur watchmaker

[Nucejoe]

On 6/10/2020 at 2:17 PM, JohnR725 said:

I don't suppose you have a picture of the dial side showing the setting parts?

Then the website below you can enter in dimensions see if anything matches or if anything's really close because then you can just modify it. Like very first one on the list Buren (BAA) Looked relatively close. Another place to look is the bestfit book Which also has a listing of balance staffs by size.

 

https://www.balancestaffs.com/product.php?dim_A=580

Neither I nor Daniel have lathe to do the modification. he can modify J & G with a broach and I haven't come across anything suitable yet, begining to look into other options.

Edited June 22, 2020 by Nucejoe
balance staff let you enter A & B only.

[Daniel123]

Not sure if this helps but I've been doing research and the movement is a IWC Swiss made and imported to USA not sure how it then ended up in Wales but it must have had an interesting history.

[Nucejoe]

1 hour ago, Daniel123 said:

Not sure if this helps but I've been doing research and the movement is a IWC Swiss made and imported to USA not sure how it then ended up in Wales but it must have had an interesting history.

Weren't IWC movements made in-house? Did IWC source staffs from Ronda?  I think I should have found an exact matching one by now. 

[Daniel123]

ok it looks like IWC made the case and Droz & Perret made the movement, a few people are suggesting that Droz & Perret was part of Longines? the movement has St Imier on it. Ive been looking on balancestaffs.com and there are some very close matches on the Longines list.

[Nucejoe]

On 6/11/2020 at 9:26 PM, Daniel123 said:

Yeah it’s a bit frustrating you can only search by A & B then you hit return. The list should show up below then it’s a case of clicking on each of them to find the best match. 

Thank you Daniel, I tried that, worked.